RecordRTC -用mic+visualization制作视频？

Question

是否有可能将RecordRTC中的“画布”记录器和“音频”记录器功能结合起来，创建一个.webm视频，其中画布动画作为视频，麦克风输入作为音频？

Answer 1

是啊。您可以将Canva-2d以及麦克风记录到单个WebM容器中。

navigator.getUserMedia = navigator.getUserMedia || navigator.mozGetUserMedia || navigator.webkitGetUserMedia;
navigator.getUserMedia({
    audio: true
}, funtion(microphone) {
    var canvasStream = canvas.captureStream(25);
    microphone.getAudioTracks().forEach(function(track) {
        // merge microphone into canvas stream
        canvasStream.addTrack(track);
    });

    // now your canvas stream has both audio and video tracks
    // now you can record it using RecordRTC
    var recorder = RecordRTC(canvasStream, {
        type: 'video'
    });

    // auto stop after 5 seconds recording
    recorder.setRecordingDuration(5 * 1000).onRecordingStopped(function() {
        var url = recorder.toURL();
        window.open(url);

        var blob = recorder.getBlob();
        var singleWebM = new File([blob], 'single.webm', {
            type: 'video/webm'
        });
    });

    recorder.startRecording();
}, function(error) {
    alert('unable to access your microphone');

});

有关更多信息，请查看：WebRTC captureStream API